Share a wall with an annoying neighbor? Have some house guests who have overstayed their welcome? Wanna see your cocky coworker get what’s coming to him? Murder is never rarely ever the answer, but some playful pranks never hurt anyone… although in this case it might cause some serious discomfort. Made up of simple parts, the Sonic Nausea Device produces a high frequency sound that supposedly makes anyone its aimed at feel nauseous. Whether or not this device really works (or violates any laws) is beyond us, but you could buy the kit to make your own and give it a try.